Question

tan55°-tan10°-tan55°tan10°​

Answer 1

tan55°-tan10°-tan55°tan10°=1

Answer is in attachment

Answer 2

Answer: we know that

tan45 = 1

tan(55 - 10) = 1

tan55 - tan 10 / 1 + tan55 tan10

tan55 - tan10 = 1 + tan55 tan10

tan55 - tan55 tan10 - tan10 = 1

i hope this helps u